Find the critical value x2r corresponding to a sample size of 19 and a confidence level of 99% if the test is two-tailed

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radil and altitudes is 4: 3? 23

If 3x+8=3x+8 is it one solution or no solution

What are the first 4 terms in the multiplication pattern given by the formula 2×4n